Explore the fascinating intersection where quantum materials meet the complexity of everyday environments in the Cond-Mat — Mes-Hall section. This field investigates how tiny particles behave when caught between the orderly world of single atoms and the chaotic nature of bulk matter, revealing the hidden rules that govern electricity, magnetism, and heat in novel substances.

Gist.Science brings these cutting-edge discoveries to you directly from arXiv, the leading repository for physics preprints. We process every new submission in this category as soon as it appears, offering both straightforward, plain-language explanations and deep technical summaries to help researchers and curious minds alike grasp the latest breakthroughs without getting lost in dense equations.

Below are the most recent papers in this dynamic area of condensed matter physics, ready for you to explore.

🔬 mesoscale physics

Engineering Defect-Phonon Interactions Through Heterophase-Interfaces in Silicon Carbide Membranes

This paper demonstrates that engineering heterophase interfaces in silicon carbide membranes via remote epitaxy significantly enhances zero-phonon optical transitions of silicon vacancy defects by tailoring defect-phonon interactions, thereby enabling bright, room-temperature quantum emitters.

Kirlie Iulius Figuera Michal, Jin Hee Lee, Keiju Sato, Takuji Maekawa, Je-Hyung Kim2026-09-29
🔬 materials science

Correlation Between Dopant Atom Evaporation Field and Measured Site Preference in Atom Probe Tomography

Using Zr-doped ErMnO3 as a model system, this study demonstrates that preferential retention of atoms during atom probe tomography, driven by evaporation field differences and analysis temperature, can significantly distort measured dopant site preferences and lead to incorrect interpretations of atomic positions.

Kasper A. Hunnestad, Constantinos Hatzoglou, Frida H. Danmo, Zewu Yan, Edith Bourret, Francois Vurpillot, Antonius T. J. (…)2026-09-29
🔬 mesoscale physics

(Sub)nanoscale Visualization of Reconstruction-Driven Moiré Exciton Localization and Delocalization

This study combines cryogenic electron energy loss spectroscopy, first-principles calculations, and optical spectroscopy to demonstrate that structural reconstruction and external strain, rather than the mere emergence of new optical resonances, are the primary drivers of real-space localization and delocalization of moiré excitons in WSe₂/WS₂ bilayers.

Medha Dandu, Sriram Sankar, Giovanny Espitia, Rwik Dutta, Patrick J. Hays, Daria Blach, Takashi Taniguchi, Kenji Watanab (…)2026-09-29
🔬 mesoscale physics

Observing Colossal and Tunable Near-field Thermal Radiation with A Highly Sensitive Annular Micro-thermocouple Junction

This study demonstrates colossal and tunable near-field thermal radiation enhancement—reaching up to 2600 times the blackbody limit and 430-fold modulation via VO2 phase transition—at nanoscale gaps using a highly sensitive annular micro-thermocouple junction with a silica microsphere, overcoming previous fabrication and sensitivity challenges.

Ken Araki, Wei Han Won, Liping Wang2026-09-29
🔬 mesoscale physics

Probing hydrodynamics in graphene and quark matter via Seebeck coefficient

This paper utilizes a kinetic-theory approach to demonstrate that the Seebeck coefficient serves as a key probe of collective hydrodynamic transport in both graphene and quark-gluon plasma, revealing significant deviations from the conventional Mott relation in low-density regimes that align with experimental data and highlight the universal fluid-like behavior of these strongly correlated quantum systems.

Subhalaxmi Nayak, Jayanta Dey, Sabyasachi Ghosh2026-09-29
🔬 optics

Plasmon-Enhanced Second-Harmonic Generation in Atomically Thin Crystalline Silver Nanostructures

This paper demonstrates that atomically thin, epitaxially grown crystalline silver nanostructures overcome intrinsic symmetry limitations and weak nonlinear responses by synergistically combining electronic quantum confinement with plasmonic near-field enhancement to achieve efficient, tunable second-harmonic generation for scalable on-chip photonic applications.

Saad Abdullah, Philipp K. Jenke, Andrew P. Weber, Álvaro Rodr\'ıguez Echarri, Vahagn Mkhitaryan, Fadil Iyikanat, Frederi (…)2026-09-29
🔬 mesoscale physics

Improving the Stability of the Hierarchical Equations of Motion for Open Quantum Systems with Strong Coupling to Structured Bosonic Baths

This paper addresses the numerical instability of the Hierarchical Equations of Motion (HEOM) method for open quantum systems with strong coupling to bosonic baths by applying a non-unitary similarity transformation that balances hierarchy-raising and lowering terms, thereby enabling stable simulations of much stronger system-bath interactions.

Salvatore Gatto, Samuel L. Rudge, Bokang Hou, Eran Rabani, Michael Thoss2026-09-29
🔬 mesoscale physics

Electron decoherence in cylindrical holes and circular apertures

This paper develops a quantitative theory of fast-electron decoherence in cylindrical holes and circular apertures by combining electromagnetic Green-tensor formulations with the fluctuation-dissipation theorem, revealing that decoherence depends on trajectory, temperature, and material response, and can dominate spatial broadening in coherent electron-beam instruments.

Cruz I. Velasco, F. Javier Garc\'ıa de Abajo2026-09-29